Can-opener.



- Patented 'Aug'. 20, |002. M. E. DUNCAN.

, cam upenn. (Applicntian med. Apr. 6, 1901:)

(No Model.)

A ORA/EY UNrrn S'rarns Armar OFFICE.

MAX E. DUNCAN, OE NE\V YORK, N. Y., ASSIGNOR TO BYRON R. BACON, OF SOUTH ORANGE, NEW JERSEY.

infini-openden.

SPECIFICATION forming part o` Letters'Patent No. 707,560, datedAugust 26, 1902.

Application tiled April 6, 1901. Serial No. 54,5 72. (No model.)

To (all whom, it 72mg/ concern:

Be it known that I, MAX E. DUNCAN, a citizen of the United States, and a resident of New York city, county of New York, and State of New York, have invented certain new and useful Improvements in Can Openers, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof, in which similar letters of reference indicate corresponding parts.

My invention relates to improvements in that class of can-openers which are provided with a perforating-point formed upon the end ofthebarand adapted toact asacenteraround which a blade fastened upon the bar moves when cutting.

The object of my invention is to provide a device of the nature described embodyingr simplicityin construction, efficieneyin operation, and economy in costof manufacture. I attain these objects in the device illustrated in the accompanying drawings, in which- Figure lis a perspective view of my device. Fig. 2 is a side view and showsthe device provided with a turned handle. Fig. 3 is an `inverted view in perspective of the knifeholder, which I shallhereinafter designate as the sliding piece. Fig. 4 is a top View 0f my device, showing a slight modification. Fig.4 5 is a cross-section taken on the line l l of said Fig. 4, and Fig. 6 is a top vview in perspective of the sliding piece in a slightlymodified form.

In practice I employ a fiat bar A, having a piercing-point formed by the tapering sides a upon the end of the double L-shaped projection CL2, which in turn is formed integral with the said bar A.

B designates a sliding piece formed with the turned flanges b, which engage around the edges of the flat bar A. The said sliding piece is provided with an extending shank b', upon the end of which I form a pointed blade b2, having a cutting edge b3.4 To prevent the sliding piece B from slipping oil, I bend the end of the bar A along the line a3, forming the lip a4, or, as shown in Fig. 2, the handle A', which I might employ, would act to keep the said sliding piece upon the bar.

The dotted lines in Fig. 2 show the relativo position of the cutting-blade to the piercingpoint when the smallest-size opening is being cut.

C designates a plate provided with a projecting tongue or blade c, having a cutting edge c', and is securely fastened to the iiat bar A by means of the rivets or pins c?.

Vhen using my device, the piercing-point is first -forced through the can, and bringing the bar down to a horizontal position the sliding piece is moved along until the cuttingblade is in the desired position. By a slight pressure the cutting-blade is forced through the 'top of the can, which can then very read. ily be cut away by bringing the handle around in a'horizontal and circular direction.

To out a square opening, I use tlie cutter c, formed upon the plate O. I Iirst perforate the can by means of the piercing-point a2 and then insert in this opening the cutter c, aud by moving the end of the bar up and down and exerting a slight forward pressure the can may be very easilycut.

In Figs. 4 and 5 I show a slight constructional modification which may be used to advantage. In this form I simply form the grooves or corrugations a5 upon the flat bar A and construct' the sliding piece B with corresponding grooves or corrugations.

The particular advantage of the form shown in Figs. 4 and 5 is that I may use much thinner metal. The corrugations will equalize the difference in strength.

In Fig. 6 I show a series of corrugations b4, running crosswise upon the flanges b of the sliding piece B. While these corrugations are not essential, they may be employed to enable the user toobtain a stron ger hold upon the sliding piece.

I Iavingthus described my invention, what I claim as new, and desire to secureby Letters Patent, is

l. A can-opener consisting of a flat bar or shank provided with a piercing-point at one end and a cutting-blade formed upon a plate attached to the said I'lat bar or shank, in combination with a sliding piece having overlapping ianges which are adapted to engage around the edges of the said shank and a cutting-blade formed upon a projecting shank extending from the said sliding piece and en- IOO a cutting-blade formed upon the end of the said shank, substantially as described.

In testimony that; I claim the foregoing as -my invention I have signed my name, in presence of two Witnesses, this nh day ot' April, 1901.

lgaging along Ialle under side of the shank and MAX E. DUNCAN.

S. S. SUGAR,

Witnesses:

B. MOCOMB. 

